"Phew,!"

Shan Tianfan couldn't get used to Wei Yannan's dragging appearance, and temporarily returned to the Qin Mingtang to which he belonged, and before the martial arts competition began, he planned to use all three opportunities to break into the tower. Although he can't break Webber's record, he can try to surpass Wei Yannan.

Just when everyone was fighting for the ranking, Du Feng was in his small room, studying a Wen Yuan Dan. This kind of elixir that supplements the true element to improve cultivation is actually very similar in principle. The only difference is that the herbs used are different, and the proportions are different.

When Du Feng was in the Ink Book House, he read all the medicinal materials in the heavenly realm, including some medicinal materials that no one had seen in the legend. At this moment, after he split Wen Yuandan and made it into fine powder, he was a little embarrassed.

Because after the medicinal materials are refined at high temperatures, all of them change their medicinal properties. And it went from colorful to dark brown, so it's not easy to tell the difference. If it was a medicinal material that Du Feng had come into contact with, then he naturally knew the difference between before refining and after refining. But the problem is that he doesn't know what the other party is using now.

One, two, three...... Twenty-one, Du Feng first sorted out the number of medicinal materials. If the analysis is correct, there should be a total of twenty-one, and only three of them he knows, because he has also used them before refining the Spirit Pill, and he knows what they look like after refining and before refining.

If you want to figure out the other eighteen medicinal herbs, you have to take the possible herbs and throw them into the Dan furnace to see what it will become. But the problem is that different furnace temperatures will make the changes of medicinal materials different. He needs to keep guessing and refining different medicinal materials at different temperatures to be able to slowly distinguish them, which requires a lot of work.

Since Wen Yuandan was refined by Wen Dantang, the medicinal materials used should have come from Yuxian Sect. Du Feng simply went to exchange for medicinal materials, except for the particularly expensive ones, a little bit of each. Because Wen Yuandan's grade is not high, the medicinal materials used cannot be too expensive, and if it is too expensive, it will be a loss.

Then put these medicinal herbs into the Dan furnace in the same way. After putting them in, observe their characteristics according to the different refining times.

Du Feng can do this job, because he has rich experience in refining, and his memory and eyesight are outstanding. In the process of refining a medicinal herb, there were many changes, and he wrote them all down at once. In this way, after all the medicinal materials were refined, Du Feng had already found out all the twenty-one medicinal materials.

If the Great Elder knew that his original Wen Yuandan had been cracked like this, I don't know if he would vomit blood in anger. Fortunately, Du Feng is not an outsider, at least he is also a disciple of Yuxian Sect, and he is also a disciple of the inner sect. The only difference is that he is not a disciple of Wendantang but a disciple of Hongye Hall.

The disciples of Red Leaf Hall were originally only good at body techniques, but Du Feng learned the Flying Shadow Streamer Sword Technique, and now he has also learned the skills of Wen Dantang. It is equivalent to the skills of Wen Dan Hall, Qin Ming Hall and Red Leaf Hall, all of which he has learned, and only Huang Fengtang's defensive technique has not yet been learned.

So does Du Feng, the defense technique of Huang Fengtang, need to be learned, of course he doesn't. He had learned the Dragon Clan's Golden Scale Protector Technique, which was much better than the Third Elder's defensive technique.

The types of medicinal materials are clear, and the heat of refining is also clear, and the only thing missing now is the proportion. It doesn't matter, Du Feng can observe and test. Of the twenty-one medicinal herbs, he prepared some more, and then began to do the test.

The last step of the test is not difficult, the only problem is that there will be a lot of waste pills. Fortunately, Du Feng's intuition was very accurate, and he found the accurate ratio after testing it a few times. Seeing that the first furnace of Wen Yuandan was refined, Du Feng laughed loudly.

"Hahaha...... I feel like I'm going to get rich. ”

After coming to Yuxian Gate, Du Feng's two biggest gains were that he learned the Flying Shadow Streamer Sword Technique and studied Wen Yuandan. In fact, there is also a lot of luck in this, that is, the medicinal materials used by the Great Elder to refine Wen Yuan Dan happen to be all in the Yuxian Sect.

If he had purchased it from various places in Tiannan and Haibei, Du Feng would not have been so easy to study and understand. For the rest of the time, he didn't go anywhere, and devoted himself to alchemy in the house. Hundreds of Wen Yuan Dan have been practiced, of which a small part is medium grade, some are high-grade, and some are superb Wen Yuan Dan.

I don't know what kind of mood the Great Elder will feel when he sees others refining the best Wen Yuan Dan. Because he is an old man at the peak of the ninth layer of the Heavenly Immortal Realm, and he is the founder of this Danfang, he has never been able to refine the best Wen Yuan Danlai.

Refining the best elixir requires many factors such as eyesight, brainpower, and reflexes, and more importantly, it requires Dan Dao talent.

For the rest of the time, Du Feng stayed in the house, even if he knew that someone was coming to him, he didn't open the door. He practiced while taking Wen Yuandan, and he was not stingy at all, specializing in taking the best pills, and kept the rest of the pills that were not the best to sell to others later.

"That kid surnamed Du, hasn't made any noise lately?"

After Shan Tianfan used up all the three opportunities to break into the Sword Tower, he still couldn't surpass Wei Yannan, so he remembered the newcomer named Du Feng again. This man performed a miracle on the first floor of the Sword Tower, but he has not moved since.

"It's just a turtle with a shrunken head, I heard that he has been staying in the house recently and hasn't come out, probably because I heard that Senior Brother Shan came back and was scared. ”

The old disciples of Qin Mingtang have completely defected to him since Shan Tianfan came back, but they don't take Zheng Kenan very seriously. Especially after Shan Tianfan surpassed Zheng Kenan on the list, more and more people defected to him.

"Well, keep an eye on it, and don't let him run away in front of the tournament. ”

In Shan Tianfan's opinion, Du Feng's strength is definitely not good, maybe he deliberately pretended to be sick to avoid the martial arts competition, and he didn't dare to go to the ring when the time came.

"Don't worry, you'll have to drag him up when the time comes. Red Leaf Hall's face was lost by him. ”

Originally, the disciples of Qin Mingtang were still afraid of Du Feng, and they didn't know if Zheng Kenan could get him. Since Shan Tianfan came back, his confidence has increased greatly, and he doesn't take Hongye Hall seriously at all.

Seeing that there were still three days to start the competition, Feng Beibei and several other senior sisters came to find Du Feng a few more times, but the door was still closed and there was no intention of opening. Hong Xiuzhen wanted to see how his cultivation was progressing, but he couldn't get in.

Another day passed, and there were only two days left before the tournament. The spacious martial arts training ground in the past has been changed to a circular ring at this time, and the audience seats have been specially set up. Everyone was familiar with the venue, but Du Feng still didn't come out of the house.